Temperature-controlled fuel-regulator.



L. M. CHAPMAN. TEMPERATURE CONTROLLED FUEL REGULATOR.

APPLICATION FILED JAN.26,1914.

1,1 17,790, Patented Nov. 17, 1914.

-per or ries a t imble or ferrule 13 upon which rests nmrnn snares rarnnr @FFKQE.

LEO CHAPMAN, OF CHICAGO, ILLTNOIS.

TEMPERATURE-CONTROLLED FUEL-rBEGULATOR.

Specification of Letters Patent.

' Patented Nov. 17, 191d.

Application filed January 26, 1914. Serial No. 814,605.

.which mayreadily be adjusted, or set, to

maintain constant. any temperature within its range of operation.

A more specific object of my invention is to provide a self contained, simple device of the kind especially well adapted to maintain constant temperature within the metal melting pot of a linotype machine.

Other and further objects of my invention will become readily apparent to persons skilled in the art from a consideration of the following description when taken in conjunction with the drawing, wherein Figure 1 is an elevation of the device showing parts thereof in sections. Fig. 2 is an enlarged transverse section, taken online 22 of Fig. 1. Fig. 3 is a transverse sec time, taken on line 3--3 of Fig. 2 and; Fig. 4- 'is a transverse section, taken online 4-4 of Fig. 2.

In all the views the same reference characters are employed to indicate similar parts.

tively high coefficient of expansion, with refierence to the support or jacket 11. It may 'be made of aluminum when the device is used for relatively high temperatures or of hard rubber or vulcanite when the temperatures with which it is to be'associated are below the melting point of such substances.

The remote end of member 10, preferably,

rests upon the bottom of the surrounding jacket or tube 11, asshown at 12. The uproximate end of the member 10 car- .a plate or disk 14, secured thereto, as by a rivet 15, whereby to hold the fiat planes of the dish 14 always at right angles to the axis of the member 10, and to preferably 7 secure it in association with said member. The plate 14 is provided with perforations 16 and with notches 17, for a purpose to be hereafter referred to.

The tube 11 is screwed into, or otherwise fastened to, a boss 18 of a head 18. The 3 head 18 is a part of the casing 20 and is provided with laterally projecting ears 19-19 on opposite sides of the diameter,for securing it to the casing 20. The casing 20 is pro vided with similar ears, or projections 2121, through which screws 22 are passed to the respective ears 1919 of the head to hold the parts together. The casing is counterbored, as at 23, to provide an interior gas receiving aperture and is provided with a similar concentric, smaller and deeper counter bore 24 for the valve stem 26. A valve 25 is provided with a hollow stem 26 that fits neatly into the counterbore 24 and is axially movable therein. The stem 26 is provided with a central bore 27, the upper portion 28 whereof, is screw threaded forvertical adjustment by means of the screw 29 carrying a disk 30. The larger portion 31, of the valve 25, is bored at right an les, as at 32 and 33, to connect the outer periphery of the part 31 with the inner bore 27. A relatively thin annulus 34: is screw threaded to the disk portion 31 of the valve to provide therebetween an annular port 35. The valve 25 is also counter bored, as at 36, leavin a relatively thin annular wall on each si e of the port 35. y

when the member 10 is expanded, as by the effect of increasing temperature, the space between the movable plate 14 and the relatively thin walls surrounding the port 35, is closed and any further expansion of the member 10 will simply lift the valve against the downward pressure of the spring 37 retaining the valve closed. Pipes 38 and 39 are screw threaded into the casing 20 through which gas may pass into the counter bore 23 and out of the center bore 27 of the stem 26 into the pipe 39. A lateral opening 40 is made through the stem 26 into the center bore 27, for this purpose. In order that the opening into the pipe 39 and'the opening 40 mav be maintained in registered position, I provide a stem 41 secured to the valve disk 31, which takes into an opening 42, within the valve casing, preventing the valve body from rotating, thereby closing communication between the pipe 39 and the interior of the valve. 7

Normally, the parts are in the respective positions shown in Fig. 2, there being an opening between the valve port and the top surface of the valve plate 14 through which the gas may pass through the pipe 39 intothe center bore 27 and out through the bore 40 into the pipe 38. It is assumed that the gas, or other fluid fuel passing through the pipe 38, will affect the temperature controlled by the expansible member 10'. When the gas entersnthe pipe 39 it will fill the space 23 and will also pass under the valve plate 14: through the notches 17-17 and through the perforations 1616 in the disk 14 into the space 36, so that the gas may. enter the annular port 35 from the inside as well as the outside thereof and quickly supply any deficiency that may be required to the gas burner from the pipe 38. By this means a large capacity is given to the valve with a very small movement and therefore a very slight degree of expansion of the member 10 will serve to close the valve controlling the gas and an equally slight contraction will open it.

To adjust the device to maintain constant I a higher temperature it is only necessary to I turn the disk 30 which rotates the screw 29 )and raises the valve structure up into the counter bore 24 against the compression of the spring 37. The spring serves to hold the valve in its adjusted position. When this has been done, the valve plate 1 1 must be raised a greater distance before closing the port 35, than before, and therefore it will require a greater heat or higher temperature to expand the member 10, the required increased distance in order to close the valve.

I have used the smooth disk 30 to turn the adjusting screw 29 because it is necessary to press the thumb or finger against the upper surface of the disk in order that sumcient friction therewith may be obtained to turn it, therefore, while the valve and its parts are heated to a high temperature as when it is in operation, unauthorized persons can not change the adjustment thereof. It is of course evident that other means for securing the disk in a fixed position after each adjustment may be employed if desired, without departing from the spirit and scope of my invention, and other modifications may be made in the structure within the spirit and scope of the claims, without departure therefrom.

When the device is used in a melting pot, for melting metal, as for a linotype machine, only the lower end of the tube 11 is immersed inthe fluid metal and, therefore, to render the device less sensitive to atmospheric changes I prefer to reduce the size of the stem 10, as at 10, in order to inclose an insulating film of atmosphere 13 between the inside of the tube 11 and the exterior surface of the reduced part 10' so that drafts of air or other extraneous influences will without departing from the spirit and scope of my invention and I therefore desire it to be understood that my claims are not necessarily limited to the specific structure, in this respect. 2

Having described my invention, What I claim is 1. A device of the character described comprising a relatively long heat responsive expansible member; a support for the remote end of said member, its proximate end secured to the casing, said support having a lower coefficient of expansion than said member; a valve part, movable by said member; a casing inclosing said valve part; another cooperating valve part in said casing, yieldingly movable in axial direction with reference to the said expansible memfor fuel pipes; a valve part comprising a hollow stem having a lateral opening for substantial register with one of said pipe openings, said hollow stem terminating in a disk having an annular valve port near its periphery communicating with said hollow stem; a thin annular wall bounding said port on each side thereof, to form a valve seat; a plate for closing said valve port and an expansible member for causing relative movement of the valve parts to close theort. 1 p 3. In a device of the character described, a casing having communicatingopenings for fuel pipes and provided with a bore for a hollow valve stem; a valve part comprising a hollow stem, adapted for free movement in said bore, and having a lateral opening for substantial register with one of said pipe openings, said hollow stem terminating in 13 an enlarged disk, having an annular valve port near its periphery, communicating with the interior of said hollow stem; a thin annular wall bounding said port on each side s-j thereof to ,form a seat, and to provide a chamber radially within said port; a plate for closing said valve port, having openings communicating with said interior chamber and an expansible member for relatively moving said parts to close the port.

In testimony whereof I hereunto set my hand in the presence of two witnesses.

LEO M. CHAPMAN. In the presence of- Fomin BAIN, MARY F. ALLEN. 

